You folks should try a little experiment with your GPS. I once left my Garmin Edge 305 on and recording as I drove home with the bike in the trunk of my car. Much to my surprise, the GPS recorded the entire trip If it can do that, while encapsulated within a steel box, I have no doubt that it will record my ride while it is in my pocket, in my hydration pack, in a pannier, etc. None of those options allows me to use the 305 as a computer or GPS unit, though.
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